ES2434123T3 - Aqueous suspension of adolescent agent for liquid treating composition - Google Patents

Abstract

An aqueous suspension of inorganic adolescent agent suitable for use in a liquid treating composition comprising: a) inorganic adolescent agent; b) organic solvent, selected from the group consisting of glycerol, sorbitol and mixtures thereof; and c) rheology modifier

Description

Aqueous suspension of adolescent agent for liquid treating composition

Technical field

The present invention relates to an aqueous suspension that is suitable for use as a component of liquid treating compositions.

Background of the invention

In the preparation of liquid treating compositions it is intended to improve the technical capabilities and aesthetic properties thereof. One method to improve the aesthetic properties of a liquid treating composition is to make it permeable.

Perlescence can be achieved by incorporating a perlescent agent into the liquid treating composition. The adolescent agents include inorganic natural substances such as mica, bismuth oxychloride, titanium dioxide and organic compounds such as, for example, salts of higher fatty acid metals, glycol fatty esters and fatty acid alkanolamides. The present invention relates only to the use of inorganic adolescent agents. The adolescent agent can be purchased as a powder, suspension of the agent in a suitable suspending agent or, when the agent is a crystal, it can be produced in situ.

The following documents of the art describe detergent compositions and dispersions that comprise fatty acid glycol ester as a permeable agent; US 4,717,501 (granted to Kao); US

5,017,305

 (granted to Henkel); US 6,210,659 (granted to Henkel); US 6,835,700 (granted to Cognis). In U.S

6,956,017

 (granted to Procter & Gamble) liquid treating compositions containing permeable agents are described. Liquid detergents for washing delicate items of clothing containing a teenage agent have been described in EP-520551 B1 (to Unilever).

The present invention relates to an aqueous suspension comprising inorganic periating agent. The aqueous suspension described in WO2007 / 111899 A2 (granted to Procter & Gamble) uses water as a vehicle for the permeable agent. However, applicants have discovered that using water as a vehicle for adolescent agent only allows maximum physical stability six weeks before the onset of precipitation of the adolescent agent.

The inorganic aqueous adolescent suspension of WO2007 / 11189 is prepared in a batch process. A measured amount of aqueous suspension of inorganic adolescent agent is then added to the continuous process used to prepare liquid treating compositions. However, as indicated hereinbefore, inorganic agents tend to precipitate from the aqueous suspension. This precipitation causes problems in the continuous processing used to prepare liquid treating compositions since depending on the area there will be either too much perlescence or total absence of perlescence.

A possible solution to these problems may be to increase the viscosity of the aqueous suspension. However, the final products will necessarily have a relatively low viscosity, especially at high shear, so that they can be poured or processed. Therefore, the components of the liquid treating composition, like the aqueous suspension, should not have too high viscosities. If, on the contrary, the aqueous suspension has low viscosity at low shear, the particles tend to separate from the suspension and float or sink during storage. This results in an unwanted and non-homogeneous aqueous suspension in which part of the aqueous suspension has pearly appearance and another part is clear and homogeneous. An aqueous suspension of such characteristics would clearly have an undesirable effect on the aesthetic properties of the final composition that may have too much perlescence or no perlescence. Therefore, the applicant has discovered that simply by varying the viscosity of the aqueous suspension, the problems set forth in the present invention are not adequately solved.

In addition, inorganic adolescent agents are insoluble and without a suitable solution they behave like wet sand, causing problems in the processing of the aqueous suspension. The behavior of wet sand makes the aqueous suspension difficult to mix and requires considerable effort with the instruments used in the mixing process.

The present invention provides an aqueous suspension and a process for preparing the aqueous suspension suitable for further processing that results in obtaining liquid treating compositions. The present invention specifically relates to the improvement of the physical stability and duration of the process of an aqueous suspension of inorganic periating agent and, therefore, to the improvement of the preparation process and the quality of the liquid treating composition. The present invention also relates to the use of a combination of solvent and rheology modifier in an aqueous suspension of inorganic adolescent agents to improve the physical stability and duration of the aqueous suspension process. Applicants have discovered that if glycerol or a sorbitol solvent is used instead of water, the physical stability of the aqueous suspension is increased, so that the aqueous suspension remains physically stable for 16 weeks. The present invention also relates to an optimization of the process of preparing an inorganic permeable agent aqueous suspension in which the addition of inorganic permeable agent is strictly controlled.

Summary of the invention

According to the present invention, an aqueous suspension of inorganic adolescent agent is provided suitable for use in a liquid treating composition comprising:

a) inorganic adolescent agent

b) organic solvent selected from the group consisting of glycerol, sorbitol and mixtures thereof.

c) rheology modifier.

The present invention also relates to a process of preparing an aqueous suspension of inorganic adolescent agent for use in liquid treating compositions comprising the steps of:

a) combining organic solvent, selected from the group consisting of glycerol and sorbitol, and mixtures thereof, and from 10% to 66%, by weight, of the 100% active inorganic adolescent agent;

b) add rheology modifier and mix; Y

c) add the rest of inorganic adolescent agent.

Detailed description of the invention

In the present invention, the term "aqueous suspension" is used herein in reference to a liquid composition that, typically, is fluid at room temperature and that contains solids in the form of water insoluble particles or other solid matter.

The aqueous suspension of inorganic adolescent agent of the present invention is suitable for use as a component of liquid treating compositions suitable for laundry or home care applications. The term "treating composition for laundry" is understood to include all liquid compositions used in the treatment of laundry including cleaning compositions and softening or conditioning compositions. The term "hard surface treating composition" includes all liquid compositions used in the treatment of hard surfaces such as kitchen or bathroom surfaces, as well as dishes and kitchen utensils for manual dishwashing or dishwashing operations.

The aqueous suspension of adolescent agent according to the present invention for this use comprises 30% to 60% water. However, preferably, water is not freely added. If the aqueous suspension does contain water, said water is preferably present as a component of another ingredient of the aqueous suspension, such as the rheology modifier premix.

The aqueous inorganic permeable agent suspension of the present invention preferably has a viscosity of 21,000 centipoise at 65,000 centipoise at 0.5 s-1 and 1000 centipoise at 3000 centipoise at 20 s-1. The viscosity can be determined by conventional methods. The viscosity according to the present invention, however, is measured with an AR 550 rheometer from TA Instruments using a steel plate stem with a diameter of 40 mm and a distance of 500 µm. The high shear viscosity at 20 s-1 and low shear viscosity at 0.5 s-1 can be obtained from a logarithmic scan at a shear rate of 0.1-1 to 25-1 in 3 minutes at 21 ° C.

The aqueous suspension of the present invention preferably has a pH of 7 to 11, more preferably 7 to 9, when measured directly from the aqueous suspension.

The temperature of the aqueous suspension and throughout the preparation process and during storage is preferably less than 35 ° C. When the rheology modifier used is hydrogenated castor oil (HCO), the temperature is more preferably between 10 ° C and 30 ° C. The HCO has a low melting point and will lose the rheology modifier activity when it melts and creates instability of the aqueous suspension.

Teen agent

The inorganic permeable agents according to the present invention are inorganic, transparent or translucent crystalline or vitreous solids capable of reflecting and refracting light to produce a perlescent effect. Typically, the adolescent agents are insoluble crystalline particles in the composition to which they are incorporated. Preferably, the adolescent agents have the form of small plates or spheres. The spheres, according to the present invention, should be interpreted as generally spherical. The particle size is measured across the largest diameter of the sphere. The plate-shaped particles are such that the two dimensions of the particle (length and width) are at least 5 times the third dimension (depth or thickness). Other forms of glass, such as cubes or needles or crystalline forms do not have a teenage effect. Many teenage agents, such as mica, are natural minerals that have monoclinic crystals. The form seems to affect the stability of the agents. The spherical agents, even more preferably, the plate-shaped agents are the ones that stabilize most successfully.

The mechanism of perlescence is described by R. L. Crombie in the International Journal of Cosmetic Science Vol. 19, pages 205-214. The light reflected from platelets or adolescent spheres, while practically parallel to each other, at different levels in the composition, creates a sense of depth and luster. Some of the light is reflected in the adolescent agent, and the rest goes through it. Therefore, the light that passes through the adolescent agent can pass directly through or be refracted. The reflected and refracted light produces a different color, brightness and luster.

The smaller the particle size and the distribution of the adolescent agent, the more easily it will be suspended. However, as the particle size of the adolescent agent decreases, the effectiveness of the agent also decreases. Therefore, it is preferred that in the present invention the adolescent agent has a particle size preferably between 5 micrometers and 32 micrometers and, more preferably, between 5 micrometers and 26 micrometers.

The aqueous suspension of the present invention preferably comprises from 1% to 35%, by weight, of the aqueous composition of a 100% active inorganic adolescent agent. More preferably, the aqueous suspension comprises from 10% to 30%, more preferably from 10% to 20%, by weight of the aqueous suspension of the 100% active inorganic adolescent agent.

The adolescent agents of the present invention are inorganic. Inorganic teen agents provide a dynamic and static teen effect. Dynamic perlescence means that the composition has a permeable effect when the composition is in motion. Static perlescence means that the composition has a permeable effect when the composition is static.

Inorganic adolescent agents:

Perorganic inorganic agents include those selected from the group consisting of mica, mica coated with metal oxide, mica coated with silica, mica coated with bismuth oxychloride, bismuth oxychloride, myristyl myristate, glass, glass coated with oxide metal, guanine, glitter (polyester or metal) and mixtures thereof.

Suitable micas include muscovite or potassium aluminum fluorohydroxide. Mica platelets are preferably coated with a thin layer of metal oxide. Preferred metal oxides are selected from the group consisting of rutile, titanium dioxide, ferric oxide, lead oxide, alumina and mixtures thereof.

The adolescent effect on these adolescent agents develops through interference between rays of light that are reflected at mirror angles from the upper and lower surfaces of the metal oxide layer. Agents lose color intensity since the viewing angle rotates at non-mirror angles and provides the permeable appearance.

More preferably, inorganic adolescent agents are selected from the group consisting of mica and bismuth oxychloride and mixtures thereof. The most preferred inorganic adolescent agents are micas. More preferably, the adolescent agent is mica coated with metal oxide, more preferably mica coated with titanium oxide, mica coated with bismuth oxychloride or silica coated mica and mixtures thereof.

Suitable commercial inorganic permeable agents are marketed by Merck under the trade names Iriodin, Biron, Xirona, Timiron Colorona, Dichrona, Candurin and Ronastar. Other commercial inorganic commercial agents are marketed by BASF (Engelhard, Mearl) under the trade names Biju, Bi-Lite, Chroma-Lite, Pearl-Glo, Mearlite and Eckart under the trade names Prestige Soft Silver and Prestige Silk Silver Star.

Inorganic adolescent agents are preferably incorporated in powder form, and are used to prepare the aqueous suspension without the need for additional process steps. The process of preparing the aqueous suspension will be described in more detail hereinafter.

Organic solvent system

The solvent system together with the rheology modifier is essential to provide physical stability in the aqueous suspension. Suitable solvents according to the present invention are organic solvents selected from the group consisting of glycerol and sorbitol, and mixtures thereof. The solvent is typically present at a level in the range of 10% to 50%, preferably 20% to 40%, by weight of the aqueous suspension.

Glycerol is a colorless, odorless and viscous liquid. It has a sweet taste and low toxicity. Glycerol has three hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature.

Sorbitol is a sugar alcohol that has six hydroxyl groups that are responsible for its solubility in water and its hygroscopic nature.

Without attempting to impose any theory, it is believed that there is a synergistic effect between the solvent and the rheology modifier. It is also believed that the system comprising these two elements creates greater elasticity within the system. This elasticity seems to mean that the system or network is able to recover more quickly after being sheared.

Rheology modifier

The aqueous suspension of the present invention comprises a rheology modifier. The general objective of adding said rheology modifier to the aqueous suspension of the present invention is to obtain an aqueous suspension that is suitably functional and aesthetically pleasing in terms of the consistency of the aqueous suspension, ease of product pouring, physical stability, properties optics, and / or efficiency of the particle suspension. Therefore, the rheology modifier will generally serve to establish appropriate rheological characteristics of the aqueous suspension and will do so without transmitting undesirable characteristics to the product such as, for example, unacceptable optical properties or unwanted phase separation. Rheological characteristics means the flow of the aqueous suspension subjected to stress and deformation.

The rheology modifying component of the aqueous suspension of the adolescent agent of the present invention can be characterized as "external" or "internal" rheology modifier. An "external" rheology modifier, for the purposes of this invention, is a material whose primary function is to provide rheological alteration of the liquid matrix. In general, therefore, an external rheology modifier will not, in and of itself, provide any significant advantages of tissue cleaning or tissue care or significant advantages of ingredient solubilization. An external rheology modifier is, therefore, different from an "internal" rheology modifier that can also modify the rheology of the matrix but which has been incorporated into the liquid product for some additional fundamental purpose. Therefore, for example, a preferred internal rheology modifier would be anionic surfactants that may serve to alter the rheological properties of the aqueous suspension, but which have been added to the aqueous suspension primarily to act as a cleaning ingredient in the final product. .

The external rheology modifier of the aqueous suspension of the present invention is used to provide an aqueous liquid matrix for the aqueous suspension of adolescent agent having certain rheological characteristics. The main feature is that the matrix should be "viscosity reduction by shear". A viscosity reduction fluid by shear has a viscosity that decreases as shear is applied to the fluid. Therefore, at rest, that is, during storage or transport of the aqueous suspension, the liquid matrix of the aqueous suspension must have a relatively high viscosity. When shearing is applied to the aqueous suspension of the adolescent agent, however, with the pouring, pumping or mixing action of the aqueous suspension, the viscosity of the matrix should be reduced such that dispensing and mixing of the aqueous suspension is Produce easily and directly.

One type of rheology modifying agent especially useful in the aqueous suspension of the present invention comprises crystalline non-polymeric materials (except for conventional alkoxylation) with hydroxyl functional groups that can form filamentous structuring systems throughout the liquid matrix when crystallized in situ. in the matrix. Such materials can generally be characterized as fatty acids, fatty esters or fatty waxes containing crystalline hydroxyl groups.

Specific examples of rheology modifiers containing preferred crystalline hydroxyls include castor oil and its derivatives. Especially preferred derivatives are, for example, hydrogenated castor oil (HCO) and hydrogenated castor wax. The rheology modifiers containing crystalline hydroxyl crystals based on commercial castor oil include THIXCIN® from Rheox, Inc. (currently Elementis).

Alternative commercial materials are suitable materials for use as crystalline rheology modifiers containing hydroxyl. An example of such a rheology modifier is 1,4-di-O-benzyl-Dtreitol in the R, R, and S, S forms and any mixtures, optically active or not.

It is believed that all of these hydroxyl-containing crystalline rheology modifiers as described hereinbefore function to form filamentous structuring systems when they crystallize in situ in the liquid matrix of the aqueous suspension of the present invention or in a premix used to form a liquid matrix of said characteristics. Said crystallization is due to the heating of an aqueous mixture of these materials at a temperature higher than the melting point of the rheology modifier, followed by cooling the mixture to room temperature, while stirring the liquid.

Other types of rheology modifiers may be used, in addition to the non-polymeric crystalline rheology modifiers containing hydroxyl described hereinbefore, in the aqueous suspension of the present invention. Polymeric materials can also be employed that will provide shear viscosity reduction characteristics to the aqueous liquid matrix.

For example, suitable rheology modifiers include those of the polyacrylate, polysaccharide or polysaccharide derivative type. Polysaccharide derivatives that are typically used as rheology modifiers comprise polymeric rubber materials. Such polymeric gums include pectin, alginate, arabinogalactan (gum arabic), carrageenan, gellan gum, xanthan gum and guar gum.

If rheology modifiers are used in the present invention, such a preferred material is gellan gum. Gellan gum is a heteropolysaccharide prepared by fermentation of Pseudomonaselodea ATCC 31461. Gellan gum is marketed by CP Kelco U.S., Inc. under the trade name KELCOGEL. Gellan gum preparation processes are described in US 4,326,052; US 4,326,053; US 4,377,636 and US 4,385,123.

In a preferred embodiment, the rheology modifier is an unsaturated monocarboxylic or dicarboxylic acid polyacrylate and C1-C30 alkyl ester of (meth) acrylic acid. These copolymers are marketed by Noveon Inc under the trade name Carbopol Aqua 30.

Preferably, the rheology modifier of the present invention is an external rheology modifier. The rheology modifier is selected from the group consisting of non-polymeric crystalline materials with hydroxyl functional groups, polymeric rheology modifiers and mixtures thereof. The rheology modifier imparts characteristics of shear viscosity reduction to the aqueous suspension. Hydroxy-functionalized non-polymeric crystalline materials are rheology modifiers that form filamentous structuring systems in the matrix of the composition after crystallization in situ in the matrix. The polymeric rheology modifiers are preferably selected from polyacrylates, polymeric gums, other non-gum polysaccharides, and combinations of said polymeric materials.

The aqueous suspension of adolescent agent of the present invention preferably comprises from 40% to 80%, by weight, of the aqueous suspension of inorganic adolescent agent of rheology modifier. Preferably, from 40% to 60% by weight, more preferably from 40% to 50%, by weight, of the aqueous suspension of inorganic adolescent agent of the present invention.

Detersive Surfactants

The aqueous suspension may also comprise a surfactant. Said surfactant may be a rheology modifier component or not. In the present invention surfactant is used as a detersive surfactant for purposes of dirt suspension.

The detersive surfactants used may be of the anionic, non-ionic, hybrid ion, ampholytic or cationic type or may comprise compatible mixtures of these types. More preferably, the surfactants are selected from the group consisting of anionic, nonionic, cationic surfactants and mixtures thereof. Preferably, the compositions are virtually free of betaine surfactants. Detersive surfactants useful in the present invention are described in US 3,664,961, issued to Norris on May 23, 1972, US 3,919,678, granted to Laughlin et al. on December 30, 1975, US-4,222,905, granted to Cockrell on September 16, 1980, and US-4,239,659, granted to Murphy on December 16, 1980. Anionic and non-ionic surfactants are preferred.

Anionic surfactants can be of different types. Water soluble salts of high molecular weight fatty acids, ie "soaps", are anionic surfactants useful in the compositions of the present invention. This includes alkali metal soaps such as, for example, the sodium, potassium, ammonium and alkylammonium salts of high molecular weight fatty acids containing from about 8 to about 24 carbon atoms and, preferably, from about 12 to about 18 atoms. carbon Soaps can be obtained by direct saponification of fats and oils or by neutralization of free fatty acids. Particularly useful are the sodium and potassium salts of the mixtures of fatty acids derived from coconut oil and tallow, that is, sodium or potassium tallow and coconut soap.

Additional, non-soapy anionic surfactants that are suitable for use in the present invention include water soluble salts, preferably alkali metal and ammonium salts, of sulfuric reaction organic products having an alkyl group in their molecular structure that It contains from about 10 to about 20 carbon atoms and an ester group of sulfonic acid or sulfuric acid. (The term "alkyl" includes the alkyl fraction of acyl groups). Examples of this group of synthetic surfactants are a) sodium, potassium and ammonium alkyl sulfates, especially those obtained by sulfation of higher alcohols (C8-C18 carbon atoms) such as those obtained by reducing tallow or coconut oil glycerides ; b) sodium, potassium and ammonium polyethoxylated alkyl sulfates, especially those in which the alkyl group contains from 10 to 22, preferably from 12 to 18, carbon atoms and in which the polyethoxylated chain contains from 1 to 15, preferably of 1 to 6, ethoxylate moieties; and c) the sodium and potassium alkylbenzene sulphonates in which the alkyl group contains from about 9 to about 15 carbon atoms, in a straight chain or branched chain configuration, e.g. eg, of the type described in US-2,220,099 and US

2,477,383. Especially valuable are straight chain alkylbenzene sulfonates in which the average number of carbon atoms in the alkyl group is about 11 to 13, abbreviated as C11-C13 LAS.

Preferred non-ionic surfactants are those of formula R1 (OC2H4) nOH, wherein R1 is a C10-C16 alkyl group or a C8-C12 alkylphenyl group, and n is from 3 to about 80. Especially preferred are alcohol condensation products C12-C15 with about 5 to about 20 moles of ethylene oxide per mole of alcohol, e.g. eg, C12-C13 alcohol condensed with about 6.5 moles of ethylene oxide per mole of alcohol.

The aqueous suspension of inorganic adolescent agent of the present invention may comprise from about 6% to 13%, by weight, of the aqueous suspension of a surfactant. The surfactant is an especially preferred ingredient of the aqueous suspension when the rheology modifier is hydrogenated castor oil.

Liquid Treatment Composition

The aqueous suspension of inorganic adolescent agent is preferably used as a component of a liquid treating composition. It is therefore preferable that the aqueous suspension satisfies the conditions of the liquid treating composition and that it can be processed with other components thereof. Suitable components of the liquid treating composition are listed and described in detail below.

The inorganic permeable aqueous suspension

The aqueous suspension has been described and discussed in detail hereinbefore.

Rheology modifier

The liquid treating composition preferably comprises rheology modifier apart from that used in the aqueous suspension of the adolescent agent. The function and choice of rheology modifier in the liquid treating composition is as already described with respect to the aqueous suspension.

Detersive Surfactants

The liquid treating composition preferably comprises detersive surfactant apart from that used in the aqueous suspension of the adolescent agent. The function and choice of detersive surfactant in the liquid treating composition is as already described with respect to the aqueous suspension.

Optional ingredients of the liquid treating composition

The liquid treating composition may comprise other ingredients selected from the list of optional ingredients shown hereinafter. Unless specified hereinbelow, an "effective amount" of a laundry aid is preferably 0.01%, more preferably 0.1%, even more preferably 1% to 20 %, more preferably 15%, even more preferably 10%, even more preferably 7%, most preferably 5% by weight of the detergent compositions.

Beneficial agents for tissue care

According to a preferred embodiment of the compositions of the present invention, a beneficial tissue care agent is included. Here, "beneficial agent for tissue care" refers to any material that can provide tissue care advantages such as fabric softening, color protection, ball / lint reduction, anti-abrasion, anti-abrasion. Wrinkles and similar to garments and fabrics, especially in clothing and cotton fabrics, when in the garment / fabric is present in a quantity of suitable material. Non-limiting examples of beneficial agents for tissue care include cationic surfactants, silicones, polyolefin waxes, latex, oily derivatives of sugars, cationic polysaccharides, polyurethanes, fatty acids and mixtures thereof. The beneficial agents for tissue care, when present in the treating composition, are suitable at a level of up to about 30%, by weight of the composition, more typically from 1% to 20%, preferably from 2% to 10% in certain embodiments.

Detergency builder

Liquid treating compositions may, optionally, comprise a detergency builder. Suitable detergency builder additives are described below:

Suitable polycarboxylate builder detergent additives include cyclic compounds, especially alicyclic compounds such as those described in US 3,923,679, US 3,835,163; US 4,158,635; US 4,120,874 and US

4,102,903.

Other useful detergency builder additives include ether hydroxypolycarboxylates, copolymers of maleic anhydride with ethylene or vinyl methyl ether, 1,3,5-trihydroxybenzene-2,4,6-trisulfonic acid and carboxymethyloxysuccinic acid, the various ammonium salts and of alkali metal substituted ammonium of polyacetic acids such as ethylenediaminetetraacetic acid and nitrilotriacetic acid, as well as polycarboxylates such as melitic acid, succinic acid, oxy-succinic acid, polymaleic acid, benzene-1,3,5-tricarboxylic acid , carboxymethyloxysuccinic acid, and soluble salts thereof.

Citrate additives, for example, citric acid and soluble salts thereof (particularly sodium salt), are polycarboxylate enhancers of particular importance for intensive cleaning liquid detergent formulations due to their availability from renewable resources and their biodegradability . Oxydisuccinates are also especially useful in such compositions and combinations.

Also suitable in the liquid treating compositions of the present invention are 3,3-dicarboxy-4-oxa1,6-hexanedioates and related compounds described in US 4,566,984, issued to Bush on January 28, 1986. Additives Useful succinic acid type detergency builders include succinic C5-C20 alkyl and alkenyl acids and salts thereof. A particularly preferred compound of this type is dodecenylsuccinic acid. Specific examples of succinate-type detergency builder additives include: lauryl succinate, myristyl succinate, palmityl succinate, 2-dodecenylsuccinate (preferred), 2-pentadecenylsuccinate and the like. Lauryl succinates are the preferred detergency builder additives of this group and are described in EP-A-0 200 263, published November 5, 1986.

Specific examples of phosphorus-free and nitrogen-containing aminocarboxylates include ethylenediamine diisuccinic acid and salts thereof (ethylenediamine disuccinates, EDDS), ethylenediaminetetraacetic acid and salts thereof (ethylenediamine tetraacetates, EDTA), and diethylene triamine pentaacetic acid and salts of the same (diethylenetriamine pentaacetates, DTPA).

In US 4,144,226, granted to Crutchfield et al. on March 13, 1979, and in US 3,308,067, issued to Diehl on March 7, 1967, other suitable polycarboxylates are described. See also US-3,723,322, Diehl. These materials include the water soluble salts of homopolymers and copolymers of aliphatic carboxylic acids such as maleic acid, itaconic acid, mesaconic acid, fumaric acid, aconitic acid, citraconic acid and methylenemalonic acid.

Bleaching system

The bleaching system suitable for use in liquid treating compositions contains one or more bleaching agents. Non-limiting examples of suitable bleaching agents are selected from the group consisting of catalytic metal complexes, active peroxygen sources, bleach activators, bleach boosters, photobleach, bleaching enzymes, free radical initiators, and hypohalite bleach.

Fragrance

Perfumes are preferably incorporated into the liquid treating compositions. Perfume ingredients can be premixed to form perfume chords before adding it to the detergent compositions of the present invention. As used herein, the term "perfume" encompasses perfume ingredients as well as perfume chords. More preferably, the liquid treating compositions comprise perfume microcapsules. Perfume microcapsules comprise perfume raw materials encapsulated in a capsule made of materials selected from the group consisting of urea and formaldehyde, melamine and formaldehyde, phenol and formaldehyde, gelatin, polyurethane, polyamides, cellulose ethers, cellulose esters, polymethacrylate and mixtures thereof; most preferably, the perfume is encapsulated with a melamine and formaldehyde wrap. Encapsulation techniques can be found in "Microencapsulation": methods and industrial applications edited by Benita and Simon (marcel Dekker Inc 1996).

Perfume ingredients and illustrative perfume chords are described in US 5,445,747; US 5,500,138; US5,531,910; US 6,491,840; and US-6,903,061.

Solvent system of the liquid treating composition

The solvent system in the liquid treating compositions, unlike that of the aqueous suspension, may be a solvent system containing only water or mixtures of organic solvents with water. Preferred organic solvents include 1,2-propanediol, ethanol, glycerol, dipropylene glycol, methylpropane diol and mixtures thereof. Other lower alcohols, C1-C4 alkanolamines, such as monoethanolamine and triethanolamine can also be used. Solvent systems may be absent, for example, from solid anhydrous embodiments of the invention, although more typically they are present at levels in the range of 0.1% to 98%, preferably at least 10% to 95%, more commonly from 25% to 75%.

Tinting and remaining dyes in the fabric

Dyes are conventionally defined as acidic, basic, reactive, dispersed, direct, for tank, sulfur or solvent type, etc. For liquid treating compositions direct dyes, acid dyes and reactive dyes are preferred; Direct dyes are the most preferred. Direct dyes are a group of water-soluble dyes that are captured directly by the fibers from an aqueous solution containing an electrolyte, supposedly by selective adsorption. In the Color Index system, the directive dye refers to several strongly conjugated molecular planar molecular structures that contain one or more sulfonate anionic groups. Acid dyes are a group of water-soluble anionic dyes that are applied from an acid solution. Reactive dyes are a group of dyes that contain reactive groups capable of forming covalent bonds with certain parts of the natural or synthetic fiber molecules. From the point of view of the chemical structure, the dyes that remain in the tissue useful in the present invention can be an azocomposite, stilbenes, oxazines and phthalocyanines.

Dyes that remain in the fabric useful in the present invention include those in the Color Index, such as Direct Violet dyes, Direct Blue dyes, Acid Violet dyes and Acid Blue dyes.

The tinting dye is included in the laundry detergent composition in an amount sufficient to provide a dyeing effect to the washed fabric in a solution containing the detergent.

Encapsulated composition

The treating composition and, therefore, the aqueous suspension of the present invention, can be encapsulated in a water soluble film. The water soluble film may be made of polyvinyl alcohol or other suitable alternatives, including carboxymethyl cellulose, cellulose derivatives, starch, modified starch, sugars, PEG, waxes, or combinations of the foregoing.

In another embodiment, the water soluble film may include other adjuvants such as, for example, vinyl alcohol copolymer and a carboxylic acid. In US 7,022,656 B2 (Monosol) said film compositions and their advantages are described.

The water soluble film may also comprise additional co-monomers. Suitable additional comonomers include sulfonates and ethoxylates. An example of a preferred sulfonic acid is 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS). A water soluble film suitable for use in the context of the present invention is marketed under the tradename M8630 ™ by Indiana Mono-Sol, (USA). The water soluble film of the present invention may also comprise other ingredients, in addition to the polymer or polymeric material. For example, it may be beneficial to add plasticizers, for example, glycerol, ethylene glycol, diethylene glycol, propanediol, 2-methyl-1,3-propanediol, sorbitol and mixtures thereof, additional water, disintegration aids, fillers, antifoaming agents, emulsifying / dispersing agents and / or anti-blocking agents. It may be useful for the water-soluble bag or film itself to comprise a detergent additive that is released into the wash water, such as organic polymer stain repellent agents, dispersants or dye transfer inhibitors. Optionally, the surface of the bag film can be lubricated with a fine powder to reduce the coefficient of friction. Sodium aluminosilicate, silica talc and amylose are examples of suitable fine powders.

Encapsulated bags can be prepared using any conventional known technique. More preferably, the bags are manufactured using thermoforming techniques by horizontal filling.

Other adjuvants

Examples of other suitable cleaning adjuvant materials include, but are not limited to, alkoxylated benzoic acids or salts thereof such as trimethoxy benzoic acid or a salt thereof (TMBA); stabilizing systems for chelating enzymes including aminocarboxylates, aminophosphonates, non-nitrogen phosphonates, and phosphoric and non-carboxylated chelants; inorganic detergency builder additives including inorganic detergency builder additives such as, for example, zeolites and water soluble organic builder detergent additives such as polyacrylates, acrylate / maleate copolymers and capture-like agents including fixing agents for anionic dyes, complexing agents for anionic surfactants, and mixtures thereof; effervescent agent systems comprising hydrogen peroxide and catalase; optical or fluorescent brighteners; polymers for dirt release; dispersants; suds suppressors; dyes; dyes; filler salts such as sodium sulfate; hydrotropes such as toluenesulfonates, cumenesulfonates and naphthalenesulfonates; photoactivators; hydrolysable surfactants; preservatives; antioxidants; anti-shrinkage agents; anti-wrinkle agents; germicides; fungicides; color spots; colored beads, spheres or extrudates; sunscreens; fluorinated compounds; clays; luminescent agents or chemiluminescent agents; anti-corrosion agents and / or protective devices; sources of alkalinity or other pH regulators; solubilizing agents; process improvers; pigments; free radical scavengers, and mixtures thereof. Suitable materials include those described in patents US5,705,464, US 5,710,115, US 5,698,504, US 5,695,679, US 5,686,014 and US 5,646,101. Adjuvant mixtures: mixtures of the above components can be prepared in any proportion.

Preparation of the aqueous suspension

The aqueous suspension of the present invention is prepared by mixing the ingredients with each other. However, the order and amount of inorganic adolescent agent addition is important and the inorganic adolescent agent must be added in two parts. This process includes the stages of

a) combine organic solvent, selected from the group consisting of glycerol, sorbitol and mixtures thereof and from 10% to 66%, by weight, of the 100% active inorganic adolescent agent

b) add rheology modifier and mix; Y

c) add the rest of the inorganic adolescent agent.

Perorganic inorganic agents are insoluble and, in the absence of a suitable solution, behave like wet sand, causing problems in the processing of the aqueous suspension. The behavior of wet sand makes the aqueous suspension difficult to mix and requires considerable effort with the instruments used in the mixing process. The addition of the inorganic adolescent agent in two parts will produce a homogeneous and processable aqueous suspension. In the first addition of inorganic adolescent agent, from 10% to 66% by weight of inorganic adolescent agent is added in steps and mixed.

Hydrogenated castor oil is a preferred rheology modifier. When castor oil is used as a rheology modifier, it is preferable to prepare a premix of the hydrogenated castor oil and surfactant in a batch process. Water is heated from 80 ° C to 98 ° C. Next, the surfactant is added to the solution and the pH is adjusted to 7-8 using a pH regulator, e.g. eg, NaOH and buffer. The hydrogenated castor oil rheology modifier is dispersed in the solution at a temperature higher than the melting point of the rheology modifier and the mixture is emulsified. The premix is then crystallized by cooling the emulsion 1 ° C / min ± 0.2 ° C / min to a final temperature of 25 ° C.

The rest of inorganic adolescent agent is added in stages and mixed.

The mixing rate of the aqueous suspension of the adolescent agent depends on the composition of the aqueous suspension; a higher percentage proportion of the adolescent agent requires a higher mixing rate compared to lower percentages of the adolescent agent. Adequate and constant mixing is required to ensure mixing and incorporation of the adolescent agent. However, the shear stress during the process must be kept at a minimum value so as not to destroy the reticular structure created by the rheology modifier.

Examples

The following non-limiting examples are illustrative of the present invention. The percentages are by weight unless otherwise indicated.

The viscosity according to the present invention is measured with an AR 550 rheometer from TA Instruments using a steel plate rod with a diameter of 40 mm and a distance of 500 µm. The high shear viscosity (HSV) at 20 s-1 and the low shear viscosity (LSV) at 0.5-1 can be obtained with a logarithmic scan of the shear rate from 0.1-1 to 25-1 in a 3 minute interval at 21 ° C.

Example 1

In an Example 1, examples A-D are examples of the aqueous suspension of the present invention.

TO

B C D

Mica

10.00 10.00 25.00 30.00

Water

30.40 48.64 30.40 30.40

Glycerol

50.00 26.00 35.00 30.00

Rheology modifier

1.60 2.56 1.60 1.60

Surfactant

6.40 10.24 6.40 6.40

NaOH (50%)

1.60 2.56 1.60 1.60

Total

100.00 100.00 100.00 100.00

LSV, cPs

21013 29934 32681 31386

HSV, cPs

1101 1297 1756 1821

Aqueous suspension A

The following table describes a detailed example of the process for preparing the aqueous suspension A. The table shows the process over time. The addition of the inorganic adolescent agent in two main stages is indicated in the table as follows: the addition, in stages, of mica (10% - 66% of the agent weight)

5 inorganic teenager) and 2nd addition, also in stages, of mica (rest of the weight of inorganic adolescent agent).

A lot size is 1100 g and a beaker diameter is 140 mm. The impeller type is inclined blade turbine and the impeller diameter is 100 mm. The clearance C (mm) is the distance from the bottom of the beaker to the impeller and can be measured with a measuring device, that is, a graduated scale or a ruler.

Stage

time (min.) Mixing Speed (rpm) Clearance C (mm) Amount of compound added (g) Addition rate (kg / min / m ^ 2)

glycerol addition

0

1st addition of mica

one 200 10 6 0.39

increase rpm

1.5 400 10

1st addition of mica

2 400 10 12.24 0.80

1st addition of mica

3 400 10 12.56 0.82

1st addition of mica

3.5 400 10 6.04 0.78

mixed

3.5 400 10

mixed

4 100 10

Adding the rheology modifier

5.5 200  10

increase rpm

6.5 250 10

Adding the rheology modifier

7.5 250  10

mixed

8 200 10

mixed

9 250 10

2nd addition of mica

10 250 10 13.6 0.88

2nd addition of mica

eleven 300 10 16.4 1.07

2nd addition of mica

12 300 10 15.5 1.01

2nd addition of mica

12.5 300 10 fifteen 1.95

2nd addition of mica

13.5 300 10 13.25 0.86

mixed

14 250 10

mixed

17 250 10

Aqueous suspension B

The following table describes a detailed example of the process for preparing the aqueous suspension B. The table shows the process over time. The addition of the inorganic periating agent in two main stages 15 is indicated in the table as follows: 1st addition, in stages, of mica (10% -66% of the weight of the inorganic permeable agent) and 2nd addition, also in stages, of mica (rest of the weight of inorganic adolescent agent).

A lot size is 1100 g and a beaker diameter is 140 mm. The impeller type is inclined blade turbine and the impeller diameter is 100 mm. The clearance C (mm) is the distance from the bottom of the beaker to the impeller and can be measured with a measuring device, that is, a graduated scale or a ruler.

Stage

time (min.) Mixing Speed (rpm) Clearance C (mm) Amount of compound added (g) Addition rate (kg / min / m ^ 2)

glycerol addition

1st addition of mica

one 200 10 13.1 0.85

1st addition of mica

2 300 10 15.3 0.99

1st addition of mica

2.5 300 10 8.3 1.08

Adding the rheology modifier

 3.5 300  10

Adding the rheology modifier

 5.5 300  10

mixed

6 200 10

mixed

7 200 10

increase rpm

7.5 350

2nd addition of mica

8 300 10 14.7 0.95

2nd addition of mica

9 400 10 14.3 0.93

2nd addition of mica

10 400 10 17.4 1.13

2nd addition of mica

eleven 400 10 13.4 0.87

2nd addition of mica

12 400 10 13.9 0.90

mixed

13 300 10

mixed

fifteen 300 10

Aqueous suspension C

The following table describes a detailed example of the process for obtaining the aqueous suspension C. The table shows the process over time. The addition of the inorganic adolescent agent in two main stages is indicated in the table as follows: the addition, in stages, of mica (10% - 66% of the weight of the adolescent agent

10 inorganic) and 2nd addition, also in stages, of mica (rest of the weight of inorganic adolescent agent).

A lot size is 1100 g and a beaker diameter is 140 mm. The impeller type is inclined blade turbine and the impeller diameter is 100 mm.

Stage

time (min.) Mixing Speed (rpm) Clearance C (mm) Amount of compound added (g) Addition rate (kg / min / m ^ 2)

glycerol addition

0

1st addition of mica

one 250 10 16.6 1.08

1st addition of mica

2 250 10 14.7 0.95

1st addition of mica

3 250 10 14.0 0.91

1st addition of mica

4 250 10 16.3 1.06

Stage

time (min.) Mixing Speed (rpm) Clearance C (mm) Amount of compound added (g) Addition rate (kg / min / m ^ 2)

1st addition of mica

5 250 10 11.4 0.74

1st addition of mica

6 250 10 20.6 1.34

mixed

6 300 10

mixed

6.5 250 10

Adding the rheology modifier

7.5 300  10

Adding the rheology modifier

8.5 300  10

mixed

9 300 10

mixed

9.5 200 10

mixed

10 200 10

2nd addition of mica

eleven 250 10 16.8 1.09

2nd addition of mica

12 250 10 17.5 1.14

2nd addition of mica

13 300 10 11.8 0.77

2nd addition of mica

14 300 10 13.8 0.90

2nd addition of mica

fifteen 300 10 13.6 0.88

2nd addition of mica

16 300 10 15.3 0.99

2nd addition of mica

17 300 10 16.6 1.08

2nd addition of mica

18 350 10 14.3 0.93

2nd addition of mica

19 350 10 13.6 0.88

2nd addition of mica

twenty 350 10 16.4 1.07

2nd addition of mica

twenty-one 350 10 10.8 0.70

2nd addition of mica

22 350 10 22.4 1.45

mixed

22.5 400 10

mixed

23.5 300 10

mixed

25 200 10

mixed

26 200 10

Aqueous suspension D

A detailed example of the process for preparing the aqueous suspension is described in the following table. The addition of the inorganic adolescent agent in two main stages is indicated in the table as follows: 1st addition, in stages, of mica (10% - 66% of the weight of the inorganic adolescent agent) and 2nd addition, also in stages, of mica (rest of the weight of inorganic adolescent agent).

A lot size is 30 kg and the diameter of the tank is 390 mm. The impeller type is inclined blade turbine and the impeller diameter is 250 mm. The clearance C (mm) is the distance from the bottom of the tank to the impeller and can be measured with a measuring device, that is, a graduated scale or a ruler.

10 The quantities and values described herein should not be construed as strictly limited to the exact numerical values mentioned. Unless otherwise indicated, each magnitude is intended to mean the mentioned value and a functionally equivalent range surrounding that value. For example, a magnitude described as "40 mm" means "approximately 40 mm."

Stage

Mixing Speed (rpm) Clearance C (mm) Amount of compound added (g) Addition rate (kg / min / m ^ 2)

glycerol addition

100 60

1st addition of mica

100 60 2980 0.80

mixed

100 60

Adding the rheology modifier

100  60

mixed

150 100

2nd addition of mica

190 150 5600 1.20

mixed

190 150

Claims (10)

1. An aqueous suspension of inorganic adolescent agent suitable for use in a liquid treating composition comprising: a) inorganic adolescent agent; b) organic solvent, selected from the group consisting of glycerol, sorbitol and mixtures thereof; Y c) rheology modifier.

2.

Aqueous suspension according to the preceding claim, wherein the inorganic periating agent is selected from the group consisting of mica or bismuth oxychloride, more preferably mica coated with metal oxide, more preferably mica coated with TiO2, mica coated with bismuth oxychloride or silica coated mica, and mixtures thereof.

3.

Aqueous suspension according to any of the preceding claims, wherein the rheology modifier is selected from the group consisting of non-polymeric crystalline material with hydroxyl, polyacrylate, polymeric rubber functional groups, other rheology modifiers of non-gummy polysaccharide type and mixtures thereof.

Four.

An aqueous suspension according to any one of the preceding claims, further comprising an anionic surfactant selected from the group consisting of C11-C18 alkyl benzene sulphonates (LAS), C10-C20 alkyl branched and random chain, C10-C18 alkyl ethoxy sulfates (AEXS), wherein x is 1-30, branched alkyl sulfates in the middle of the chain, branched alkyl alkoxysulfates in the middle of the chain, C10-C18 alkyl alkoxycarboxylates comprising 1-5 ethoxy units, modified alkylbenzenesulfonate (MLAS), C12-C20 methyl ester sulphonate (MES), C10-C18 alpha-olefin sulfonate (AOS), C6-C20 sulfosuccinates, and mixtures thereof.

5.

The composition according to any of the preceding claims, further comprising a non-ionic surfactant selected from the group consisting of C9-C18 alkyl ethoxylates, C6-C12 alkyl phenol alkoxylates, C12-C18 alcohol condensation products and C6-C12 alkyl phenol with block polymers of ethylene oxide / propylene oxide, branched C14-C22 alcohols in the middle of the chain, C14-C22 alkyl branched alkoxylates in the middle of the chain, alkyl polyglycosides, fatty acid polyhydroxyamides, poly (oxyalkylated) alcohols terminally protected with ether groups, sorbitan esters of fatty acids (C12-18), and mixtures thereof.

6.

Aqueous suspension according to any of the preceding claims, wherein the weight of the solvent is present at a level of 10% to 50% of the weight of the aqueous suspension of inorganic periating agent, more preferably 20% to 40% of the weight of the aqueous suspension of inorganic adolescent agent.

7.

Aqueous suspension according to any of the preceding claims, wherein the inorganic permeable agent is present at a level of 1% to 35% of the weight of the inorganic permeable agent aqueous suspension, more preferably from 10% to 30% and, more preferably , from 10% to 20% of the weight of the aqueous suspension of inorganic adolescent agent.

8.

Aqueous suspension according to any of the preceding claims, wherein the rheology modifier is present at a level of 40% to 80% of the weight of the aqueous suspension of inorganic periating agent, more preferably from 40% to 60% and, more preferably, from 40% to 50% of the weight of the aqueous suspension of inorganic adolescent agent.

9.

Aqueous suspension according to any one of the preceding claims, wherein the rheology modifier is present as a premix of hydrogenated castor oil and surfactant, and wherein the surfactant is preferably present at a level of 6% to 13% of the weight of the rheology modifier premix.

10.

A process for preparing the aqueous suspension according to any of the preceding claims, for use in detergent compositions comprising the steps of:

i) combining organic solvent, selected from the group consisting of glycerol, sorbitol and mixtures thereof and from 10% to 66% of the weight, of the 100% active inorganic adolescent agent, ii) add the rheology modifier and mix, iii) add the rest of inorganic adolescent agent.